Method of constructing fire extinguishers



Oct. 6, 1931. c. WILLIAMS 1,826,684

METHOD OF CONSTRUCTING FIRE EXTINGUISHERS Filed July 16, 1928 INVENTORBY fiar/a A TTORNE Y l' at'ented Oct. 6, 1931f v CHARLESL.:WILLI AIVS,or

' METHOD or colvsr-n voirrneflrrnnnxjimeuisnnns I Application filed July16,

This invention relates to fire extinguishers,

,ofthe hand type, and has as one .of its objects to provide anon-leakable fire extinguisher which utilizes a liquid fireextinguishing agent and to contain, without leakage, a high air pressurewherewith to forcibly expel'the' agent.

' .Another object of the invention is :to provide a fire extinguisherthat will providea valve sealed to one end ofthe extinguisherandcon'imunicating with the bottom of the tank, and havinga valve seatthat" is positive 7 ly sealable to permanentlymaintain the pressure inthe tank. 1 p p A further object of the invention iszto provide a fireextinguisher in which extinguisher the valve forms a nozzle, the nozzlebeing,

adapted to be secured to anair line for charging purposes, having itsparts arranged that;

the influx of air during charging will auto matically cleanse thechannel from the endof the nozzlethrough allcoxnlnunicating pas-'sagesand to the liquid-agent.

\Vith these and other-objects in view reference isnow hadto theaccompanying drawings in which a Fig. l is a side elevation ofthedevice; and

Fig. 2 is a partial sectional elevation of the valve, enlarged.

Having reference to the drawings like nu-- merals refer to like partsthroughout the several views an'dthe numeral-l'refers' toastorage tankwhich-consists of a seamless tube'Q elongated 'and'having a diameter forconvenient handling, andfhaving cast heads threadedly engaging, theendsv of the tube,- as

- shown in Fig. l, and further sealed by sweating as in the usual mannerby theuse of soft solder 4 or the like, and for the purpose ofpositively preventing any leakage ofair due to its high pressure, thepressure being about one-hundred pounds'to the square inch, Containedwithin th1s;tank -1s a fire-'ex tinguishing agent consisting ofcarbon-tetra chloride, a liquid, and which is intended to be directedtoward the fire bymeans of a nozzle 5 and in a manner to be explained.

One of the cast heads is adapted to form the top of the extinguisher.and in this head is a valve 6 secured and sealedtherein by.

terp'osed 1e aaf sii i iraigeasm. I

thradejdengagernent and bynieans of a soft metal flwasher 7 preferablyof lead, beingin betweenthe valve and' the' head for sealing purposes. rF.

By thisarra n'gement the valve may bere- ALHAMBRA, CALIFORNIA; ASSIG-NORTo. FREEMAN GARZBER, or LOS Anemlns oamroimm 1 y moved *for the renewalof the extinguishing 7 1 agent; the valve then being replaced with; a

reasonable-"assurance of perfect sealing byf means of'the'said 'softmetal washer.

The valve 6 consists of a shell 8 preferably e6 having a raised -valveseat 9, as shown in 'Fig.

2 and a stem 10 is inserted in'the shell" in;

threaded engagementwith that'm'ember and preferably providedlwi'th 'ahand wheel 11 whereby the valve stem may befraised and lowered toclose'or'open the valve, in the nature'of'eompression cocks, and thevalveistern lO'conta-in's' "a' soft metal washer-12 adapted,

toregister withthe raised portion 9-of'the' seat'to provide a positivesealable closure for said Valve; v v V andl'engage's the "shell and'containsjpacking 14; wherewith to maintain that'part of. the

valve perfectly tight, to prevent air leakage at that point duringcharging. q

'lhevalve is f-urtherprovidedwith an extended member forining an inner,tube 15 innertube' is' d'esignedto extend to the bot tom of the tank'wherewith to provide a passage-way for the extinguishing agent duringuse;

'.; 'Tor'provide ar finiag at. tank was.

under high 'pressure and for directing the flow of agent a directiondesired, "the'noza ic l c nten henozzleha's inner end; 1'1, positionedadjacent .tojtheninetal;washer' 12- .and this,

the 'inner tube, 15 positionedin prolongati on ofthe'valve.6,'arrangesthe parts insuch a manner; thateach [new chargeof air entering theytankpwill pass through and; by

the part 9. automa i al y qleanse'theepas Apackinginut i3surroundsthe'valve'stein I which; is made apart of said valve, and the ap sage-way of the liquid of any corroding salts which might haveaccumulated thereon.

The lead washer 12 used as a valve resists the chemical action of theextinguishing agent and the relatively large inner tube 15, which ispreferably constructed of copper, being the only parts which remain incontact with the chemical, thus reasonably provide for a freepassage-way of the liquid 'after' an indefinite period of rest, whilethe small directing channel 18 of the nozzle is not effected by thechemical as it is separated therefrom by the closed valve and permahandwheel and the air pressure is turned on.

until about one-hundred pounds pressure is forced into the tank, 7

It is now'obvious that this final act of forcing the air back throughthe valve and into the tank cleanses those parts of any possibleobstruction, and that upon closing the valve by means of its-hand. wheeland against its lead seat that the extinguisher is hermetically sealeduntil the time of future use.

Upon the occurrence of fire, the tank is seized and the valve openedwhen the air pressure will force the liquid through the nozzle and on tothe flames, thus extinguishing the fire.

Having thus described my invention, I claim: I

1. A method of constructing a fire extinguisher consisting of providinga seamless tube for a container attaching cast seamless heads to thetube, rendering the joints so made airtight by sweating with a solder,providing a threaded aperturein one of said heads, threading a valve forremovable and threaded engagement in said aperture and utilizing a softmetal interposed between the valve and head as a sealing means, all forthe retention of an extinguishing agent under vpressure, providing anozzle i nsaidvalve, and providing a soft metal seat associated withsaid valve to control the flow of the agen through said nozzle. 7 a

2. A method of constructing a fire extinguisher consisting of providinga tube for a container, attaching seamless heads to said tube, renderingthe joints so made air tight by sweating with solder, providing athreaded aperture in one of said heads, threading a'valve for removaland threaded engagement in said aperture, and utilizing a soft materialinterposed between the valve and head as a sealing means, all for theretention of a sealing agent under pressure, providing a nozzle on saidvalve having its parts arranged for automatic cleansing by the influx ofair during charging, and providing a soft metal seat associated withsaid valve to control the flow of the agent through said nozzle.

In testimony whereof I affix my signature.

CHARLES L. WILLIAMS.

